package syn;

/**
 不安全的取钱
 两个人去银行取钱，账号
 */
public class UnsafeBank {
    public static void main(String[] args) {
        Account account = new Account(100, "结婚基金");
        Drawing you = new Drawing(account, 50, "你");
        Drawing wife = new Drawing(account, 100, "媳妇");

        you.start();
        wife.start();
    }
}

//账户
class Account{
    int money;
    String name;
    public Account(int money, String name) {
        this.money = money;
        this.name = name;
    }
}

//银行：模拟取钱
class Drawing extends Thread{
    Account account;
    int drawingMoney;
    String name;
    int nowMoney = 0;
    public Drawing (Account account, int drawingMoney,String name){
        super(name);
        this.account = account;
        this.drawingMoney = drawingMoney;
    }


    //取钱
    @Override
    public  void run() {
        //锁的对象就是变化的量
        synchronized (account){
            if(account.money-drawingMoney<0){
                System.out.println(Thread.currentThread().getName()+"钱不够，取不了");
                return;
            }
            //sleep可以放大问题的不安全性
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            account.money -= drawingMoney;
            nowMoney += drawingMoney;
            System.out.println(account.name+"余额为："+account.money);
            System.out.println(this.getName()+"手里的钱："+nowMoney);
        }
    }
}